An HPD Sergeant on routine patrol in Nanakuli witnessed a fight on the side of the road and pulled over to investigate. The incident happened yesterday around 3: 15 p.m. As the HPD Sergeant got closer, he heard a gun shot and identified a 27-year-old man as the possible shooter. The Sergeant pursued the suspect, who fled on a moped, and arrested him. Through an investigation, officers determined that another man, 28, also at the scene, was involved. The second suspect allegedly showed up with the gun first and handed it over to the 27-year-old man. Both suspects were arrested.